{% include "AssetsUploadBundle:MyUpload:inc.html.twig" %}
<input type="hidden" name="picMain" class="MyUpload"/>
{#使用说明#}
{#1.引入所需库#}
{#2.选定任意元素#}
{#3.class=MyUpload#}
{#4.name需要跟表单元素一致#}